can joe biden tonight stop the slide in the polls for president obama? >> well, norah i don't think there's a slide in the polls. there was a bunch after the debate. i think it was mostly last week. these polls that you conducted don't measure the days since the debate, they measure from what happened before the debate to after. i don't think there's big momentum. there's no doubt governor romney collect ad couple of points mostly republican leaning independents as a result of the last debate. what i think that vice president can do is really drive home the fact that one candidate, the president has a vision that has squarely in it the interest of the middle class and the notion that you build the economy through the middle class and through a strong middle class and the other side has the same strictle down theory that congressman ryan voted for all through the last decade, big tax breaks for the wealthy, deregulate wall street, let them write their own rules and hope for the best. we know how that story ends. >> paul ryan said he expects joe biden to c